Rtazz the 2nd ac unit in the bedroom does have an outlet on the drivers side into the main duct run. The fact that it is pretty much just hacked into the side of the main run at a 90• angle doesn't help it push much air but I'm sure it's better than not having it. The other issue I don't much care for is if u do open the louvered grill to let the air blow right out of the ceiling the unit is very loud I should say air noise is very loud. The install is very straight forward on a replacement I don't know however if u have to cut a hole in the rubber roof or not for a new install that's yhe only thing that would complicate things a bit but all in all it's not a bad job. If you need pics I can get u some.
06 3500 Laramie Dodge Mega Cab 4x4 5.9CTD Short Bed Dually
13 Sandpiper 365SAQ Fifth Wheel
05 Chevrolet Tahoe
93 F-250 XLT 4x4 Diesel Banks Sidewinder (gone but not forgotten)
79 Jeep CJ-7
77 F-250 Crew Cab Short Bed 4x4